Reversible magneto testing device



March 1, 1949. c. G. ABBOTT 2,463,134

REVERSIBLE MAGNETQ iESTING DEVICE Filed April 1 1947 2 Sheets-Sheet 1- L Z f Inventor Charles 6. Abbott I By EM ,3

March 1, 1949. c, 5, 2,463,134

REVERSIBLE MAGNETO TESTING DEVICE Filed April 16, 1947 2 Sheets-Sheet 2 Im'eutor Charles '6. Abbott Attorneys Patented Mar. 1, 1949 UNITED STATES PATENT OFFICE.

2,463,134 REVERSIBLE MAGNETO TESTING DEVICE Charles G. Abbott, Quincy, Ill. Application April 16, 1947, S'eria1 No. 741,784,

Claims.

This invention relates to novel and useful improvements in a reversible magnetotesting device and more specifically pertains to a testing stand for supporting the magneto and is provided with gearing for manually rotating magnetos in a predetermined, reversible direction, in response to continuous uni-directional rotation of a handle.

The principal purpose of this invention is to provide a magneto testing stand whereby right and left hand magnetos may be selectively rotated in their predetermined directions of rotation in response to uni-directional rotation of a handle.

Further important objects of the invention reside in providing an efiective device in accordance with the foregoing object, wherein improved means are provided for adjustably mounting and positioning a magneto upon the support stand; wherein readily changeablegearing is provided for imparting rotation in a predetermined direction to a magneto'in response to uni-directional rotation of an operating handle; wherein the alteration in the gearing drive for reversing the direction of the rotation of a magneto may be readily effected from without the gear enclosing casing.

Additional important objects of the invention consist of providing an apparatus in conformity with the above mentioned objects, which shall be of simple construction, easily assembled and dismantled as desired, adaptable to accommodate various types of magnetos; and which shall be of simple, inexpensive and durablebonstruction and highly efficacious for the purpose for which it is intended.

These, together with various ancillary objects of the invention which will later become apparent as the following description proceeds, are realized by this device, a preferred embodiment of which has been illustrated, by way of example only in the accompanying drawings, wherein:

Figure l is a top plan view of the magneto testing stand, showing a 'magneto supported thereon in proper position for testin Figure 2 is a rear end elevational view of the device shown in Figure 1, the magneto and the indicating apparatus being omitted therefrom;

Figure 3 is a top plan view of the base of the testing stand, the indicating device, magneto support and gearing support being omitted therefrom;

Figure 4 is, a fragmentary front elevational yiew of the testing stand, parts being broken 2 away to illustrate the construction of the gearing assembly;

Figure B isaside elevational view ofthegearingassembly, parts of the house beingibroken away to indicate the position of the gearing therein;

Figure 6 is :a irontlelevational view of ,a u stub axle employed 'for someiof the-gearing, and;

Figure '7 is an-elevational view of the stubaxle employed for selectively journaling the driving gear of the assembly,

Referring nowi more specifically to the accompanying drawings, wherein like numerals indicate similar parts throughout the various views, attention is directed first to Figures 1-3 wherein Ill designates generally the novel testing stand forming the subject of this invention and which as shown comprises a base 12 of generally rectangular form-and which may be of any suitable material and size.

Suitably positioned upon the baseand removably secured thereto as by bolts M or the like, are a pair-of laterallyspaced longitudinally .extending guide rails lfieachrail consisting of a flanged bottom portion 18 with a superincumbent top portion 20, these members forming achannel 22 therebetween. The construction of the channel guide members .is best. shown in vFigure 2. Slidably received for longitudinally guided movements in the channel members 22, is the bottom flanged base 24- of the magneto supportZB. The support 26 comprisesia vertical standard rising from the base portion 24 which standard is provided with a circular aperture,

28 and a pair of bores 30 by means of whichta magneto 32 may be seated thereon and retained as by bolts or the like 34 engaging the magneto casingi through the bores 30. The armature shaft of the'magneto, not shown, is intended to extend through the circular aperture 2 8, whereby thecustomary coupling plate-itcarried upon the end of the magnetoishaft may be selectively engagedwith a tongue coupling plate 38, carriedby adriving shaft 40.

A bracket 42 is attachably secured as -at 44 at a suitable position upon'the base plate t2 and isprovided with a plurality of spark-gaps designated generally at 46-whieh are adaptedtor connection by suitableconductors-notshown with the conventional binding posts of the magneto, for testing the timing and strengthof the mag, neto-in aconventional manner.

Adjacent the-front endof the base plate t2 is detachably secured in a manner to bee-laterally adjustable of the base [2, a gearing support consisting of a vertical supporting plate 48 having a base flange 50 slotted as at 52 for lateral adjustments upon the base l2 and retained by a plurality of fastening bolts 54 extending throughthe slots 52 and threadedly engaging suitable threaded bores 56 in the base plate.

As so far described, it will thus be seen that a magneto when mounted upon the supporting bracket 26, may be'readily adjusted longitudinally of the supporting base i2, while the gearing support 48 may be laterally adjusted of the same base whereby various types and sizes ofmagnetos may be accommodated upon the testing machine.

Attention is next directed more specifically to Figures 4 and for a better understanding of the driving mechanism rotating the magnetos. Upon the front surface of the gearing support plate 48, is rotatably mounted a pair of meshi g gears 58 and 60, journaled upon the bearing'portion 62 of the stub axle having a headed portion 64 and a screw threaded portion 66 adapted for detachable engagement in screw threaded bores 68 and ill on the support plate. As shown in 12, the headed portion 64 may be provided with a kerf or slot for detachably securing the stub axle to the support plate.

Preferably the lowermost gear 60 is attached to the driving shaft 40, the latter being supported in a suitable boss 14 mounted upon the rear surface of the support plate 48.

Alternatively, the gear 58 only may be mounted upon the detachable stub axle 52 as above mentioned, while the gear 69 may be integrally formed with the driving shaft 43, whereby the gear and driving shaft are journaled in the bushing or boss 14 extending from the rear surface of the gearing support plate E8. 2 It is a feature of this invention that 'a driving gear may be selectively and alternatively connected to the gears 58 and 6D in order to drive the gear 60 and driving shaft 40 in reverse directions, upon a uni-"directional rotation of the driving gear. For this purpose, the support plate 48 p is provided with a pair of vertically aligned screw threaded bores 76 and 18 respectively, see Figure 2, which are adapted to selectively receive the screw threaded extremity 8!] of the stub axle having a journal portion 82 and a headed portion 84. A driving gear 86 is rotatably mounted upon the journal portion 82 and has a forwardly extending hub portion 88 upon which is rigidly engaged the split clamped end 90 of a crank arm 92 having an operating handle Q6. As shown in 96, both of ,these are provided for clampingthe split end of the handle rigidly upon the hub of the gear 85, for rotating the same upon the journal 82.

The arrangement is such that when the stub axle 82 is mounted inthe uppermost bore 76, the driving gear 86 is in mesh with the idler 58 which in turn drives the driving gear and the driving shaft. Alternatively, when the stub axle 82 is supported in the lower bore 18, the driving gear 86 is in mesh with the lower gear the upper gear 58 running idle, whereby the same directional rotation of gear 86 and handle 94 will serve to rotate the driving shaft 40 in a reversed direction from that of the previous arrangement. It will thus be seen that it is merely necessary to unscrew the head 84 of the stub axle 82, and selectively raise or lower the stub axle and the driving gear '86 journaled mount the gear in the center of the bores 16 and 18. I i

thereon, to selectively A gear housing or casing comprising a cover 93 is detachably connected as by fastening screws Hill to the front surface of the support plate 48 to constitute a guard for protecting and enclosing the driving gear. This cover is centrally cut away as at I02 to provide clearance for the rotation of the hub 88 and clamp of the handle 92. The cover plate is further provided as indicated in dotted lines in Figure 2, with a longitudinally extending slot l 04 of suflicient dimension and suitably positioned to allow raising and lowering of the stub axle 82 therein for selectively positioning the latter in the support bores 76 and 18. .It will thus be seen that the head 84 of the stub axle may be manipulated from outside the cover 98, and that the stub axle, handle and gear 86 may be moved as a unit within the slot M4 to properly position the driving gear 86. This adjustment may be made without removing the cover 98 from the gearing assembly.

From the foregoing it is believed that the manher of operating the device will be readily'understood. Various types of magnetos may be adjustably mounted upon the base, and detachably connected in driving relation to "the shaft ll whereby they may be operated by the handle $2 and above described gearing. Any suitable gear ratios may be provided for operating the magnetos at any desired speed. Obviously,"the interchangeably gearing permits driving right or left hand magnetos, from a uni-directional rotation of the operating handle 94.

Although the principles of this invention have been shown applied to a manually operable magneto drive gearing, it will be readily understood that motor operating means may be employed. However, the manual operating meansseem' to be extremely beneficial, since magnetos maybe rotated at relatively slow and relatively fast speeds by the same gearing, for conducting various tests thereon.

It should be noted that this device is extremely portable in its nature, and has all "of the necessary magneto supporting, driving andtesting elements, supported upon a' single stand whereby the apparatus may be readily transported and applied to different makes of magnetos for test= ing the same. Moreover, the magneto support, the testing indicator and the gearing support may be readily removed from the stand in order to facilitate compact storage and transportation of the device. a

Since numerous-modifications will readily occur to those skilled in the art after consideration of the accompanying specification and claims it-is not intended to limit the invention to the exact construction shown and described, but all suitable modifications may be resorted to falling in the scope of the intended claims.

What is claimed as new is as follows:

1. A magneto testing stand comprising a base, a magneto support on said base, a gearing support on said base, a pair of meshing gears journaled on said support, one of said gears having a detachable coupling for driving the shaft of a magneto carried by said magneto support, a driving gear selectively-engageable with one of said meshing gears for reversibly driving said coupling, a stub axle upon which the driving gear is journaled, and a pair of bores on said gearing support for selectively receiving said stub axle, said bores being so located as to position said stub axle to mesh said driving gear with a' c'orresponding one of said pair of gears." v

2. The combination of claim 1 and means whereby said magneto support is longitudinally adjusted on said base.

3. The combination of claim 2 wherein said means includes laterally spaced, longitudinal guide channels on said base, said magneto support being slidably retained in said channels.

4. The combination of claim 1 and means whereby said gearing support is laterally adjusted on said base.

5. The combination of claim 4 wherein said means includes a base flange having a plurality of slots laterally spaced therein, externally threaded lugs on said base extending through said slots, and a plurality of internally threaded sleeves carried by said lugs.

CHARLES G. ABBOTT.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 676,131 Hartman June 11, 1901 898,682 Riflie Sept. 15, 1908 1,381,686 Whigelt June 14, 1921 1,536,081 Dean May 5, 1925 1,891,847 Stroedter Dec. 20, 1932 Flinchbaugh Aug. 10, 1948 

